As they say, everybody has an opinion, and most people desire to express such. The problem though thereupon comes when certain people get so attached to their opinion that they have expressed, that they don't want to ever give ground on it, and then when someone else, has an opinion that so differs from theirs, this may so present a war of dominance of one versus the other. To a certain degree, that is to be expected, but when we get to those times when it gets all so serious, in which each party, is thereby determined at all costs that they are right, this thus creates a lot of friction and possibly lasting resentment. Further, though, the person that believes that their opinion is right, and typically each party so does, often also has a very strong tendency to not desire to actually listen to the other side, because they aren't interested in engaging with the other party, let alone even considering their opinion as possibly have some validity or possibly even being right.
So then, those that have strong opinions are typically the very same people that have closed minds, and closed minds do not listen to what other people have to say, because they feel that they don't need to, for they perceive their mind as being correct. While there is something to be said, about being consistent, and true to one's own word, there is also something to be said, about the need to actually have an open discussion with another person who is entitled to state their own opinion, of which, common courtesy and fair play should encourage one another to hear the other person out, which when so done, could lead to some give and take between those parties, leading to a better situation, of which, there would then exist some sort of common ground, that can thereby create a possibility of collaboration rather than of dominance.
In those situations, in which, people aren't willing to listen to reason, because they aren't even going to bother with the listening; then opinions so expressed really come down to finding those other people, that are in lockstep with one's own opinion, and leaving therefore all those that are in opposition, behind. While there is merit in unity, there is also merit in diversity, along with the fact that those that will not broker any dissent or honest feedback or open communication are essentially know-it-alls that might not actually know it all.
Each of us is unique as an individual, and in large communities, there can be an incredibly diverse amount of backgrounds, interests, and achievements within that community. Yet, we have an inherent obligation to not only to be of assistance to our family and to our friends, but also to be of assistance to the community that we are members of, of which, we are therefore obligated as a good neighbor to do our part in helping to make that community a better place for our being a part of it. This thus signifies that those that insist that it is their way or the highway, so that they therefore are the dominant one, are often the very people that are not repairers of the breach, but rather are the ones that create the breach to begin with.